Testing branch

Fixing grammar mistakes

+ Added new "Leader Class" dropdown, where each player individually can set which type of resistance leader you want to play as. Revolution Mode has been moved from a gamemode to a leader class. Next few updates will likely add more
- Rewrote code for serial killer targets, which should hopefully prevent the SK from getting assigned himself

-Finally got rid of that awful camera shaking

+ Ichtyosaur can eat when pressing G on a corpse. Eating will heal it
+ All headcrab zombie types will get a very slow passive heal, meaning that if they're downed, they will eventually get back up
~ Hack Disk can only be crafted by resistance
~ During PVP, headcrabs respawn every 15 seconds